Título:
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Observation of New Ξ0c Baryons Decaying to Λ+cK−
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Autor/a:
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Calvo Gómez, Míriam; Camboni, Alessandro; Golobardes, Elisabet; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
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Otros autores:
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Universitat Ramon Llull. La Salle; CERN |
Abstract:
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The Λ+cK− mass spectrum is studied with a data sample of pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb−1 collected by the LHCb experiment. Three Ξ0c states are observed with a large significance and their masses and natural widths are measured to be m[Ξc(2923)0]=2923.04±0.25±0.20±0.14 MeV, Γ[Ξc(2923)0]=7.1±0.8±1.8 MeV, m[Ξc(2939)0]=2938.55±0.21±0.17±0.14 MeV, Γ[Ξc(2939)0]=10.2±0.8±1.1 MeV, m[Ξc(2965)0]=2964.88±0.26±0.14±0.14 MeV, Γ[Ξc(2965)0]=14.1±0.9±1.3 MeV, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ+c mass. The Ξc(2923)0 and Ξc(2939)0 baryons are new states. The Ξc(2965)0 state is in the vicinity of the known Ξc(2970)0 baryon; however, their masses and natural widths differ significantly. |
Fecha de creación:
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06-2020 |
Materias (CDU):
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539 - Constitució física de la matèria |
Materia(s):
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Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) |
Derechos:
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© CERN
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/ |
Páginas:
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11 p. |
Tipo de documento:
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Artículo Artículo - Versión publicada |
DOI:
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http://doi.org/ 10.1103/PhysRevLett.124.222001
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Editor:
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American Physical Society
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Publish at:
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Physical Review Letters, 2020, Vol.124, 222001
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Compartir:
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